Control of Power Electronic Converters
Technical Lecture Session
Control of AC-DC and DC-AC
DAB dc-dc Converter, Grid-Connected Converter, High Power Quality, Unfolder
The DAB-based AC-DC converter with isolated ability has been studied to connect the ac grid and the dc bus with unfolder operation for high efficiency performance, and the DAB dc-dc stage is employed to realize the half sinusoidal modulation. Generally, there are two kinds of load conditions for this AC-DC converter, including the resistor load and the grid voltage source. When the DAB-based AC-DC converter is connected with the load resistor, the accurate power flowing model is analyzed, and then, a simple power-based modulation scheme is proposed for high power quality. Moreover, when this AC-DC converter is connected with the grid voltage source, a SPBM scheme is also proposed for high power quality and regulating both the active power and the reactive power.